Burglar-alarm



(No Model?) 0. E. LUBURG.

BURGLAR ALARM. No. 307,058. I v Patented Oct. 21, 1884 n. PETERS. m whogmphur, wmmmm n. c.

UNITED. STATES PATENT OFFICE.

CHARLES E. LUBURG, OF PHILADELPHIA, PENNSYLVANIA.

BURGLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 307,058, dated October21, 1884.

Application filed December T0 aZZ whom it may concern:

Be it known that 1, CHARLES E. LUBURG, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Burglar-Alarms, whichimprovement is fully set forth in the following specification andaccompanying drawings, in which Figure 1 is a front view, partly brokenaway, of a burglar-alarm embodying my invention. Fig. 2 is a view ofaportion of the rear thereof partly broken away. Fig. 3 is a top view ofa detached part.

Similar letters of reference indicate corresponding parts of the severalfigures.

. My invention consists of a burglar-alarm in which a bell-hammer isreleased by a falling weight, which latter is primarily placed looselyon a knob, key, bolt, sash-frame, &c., the movement or the turning ofwhich. causes the weight to lose its support and drop, the constructionand operation being hereinafter fully set forth and definitely claimed.

Referring to the drawings, A represents clock-work, the power of thespring of which is exerted on the escapement-wheel B for operating thebellhammer C, as well known in burglar-alarms.

D represents a hook, which i is attached to the plate A of the alarm forthe purpose of suspending the same in position, and in order to permitthe folding of said hook it is pivoted to said plate, said hookrendering the alarm portable and adapting it to be readily hung up andremoved.

E represents a lock for the bellham mer O, the same consisting of apieceof wire or other suitable material fittedin guide E in the frame of theclock-work, so as to slide therein, and bent or shaped to have one endbear against the arm of said hammer as aspring, said wire entering thealarm from below, so as to be withdrawn from the hammer by downwardaction.

F represents a chain or cord which is atnear the door or window to beguarded, the

ing tripped, is no longer controlled by the lock, and becomes operativeby the action of the clock-work, whereby the bell is rung and the alarmaccordingly sounded. By proper operation of the lock inward or upwardthe hammer may be again controlled,whereby the alarm ceases. During theday time or evening the entire device may be removed or the weightsuspended, so as not to. be exerted on the lock.

In order to cause the weight to set properly on the different localitiesstated, it is made concave on its lower side and winged or bifurcated,thus presenting arms projecting at various angles, the same adapting theweight for lodgment on said localities.

If desired, the weight may be held stationary and the clock-work andconnected parts hung on the knob, &c., so as to fall, and cause by theaction of the chain or cord on the lock the release of the bell-hammer.7

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isv 1. In a burglar-alarm, clock-work and abell-hammer, in combination with a lock, E, consisting of a bent pieceof wire, one end or limb thereof acting as a spring and'a guide for saidlock, substantially as and for the purpose set forth.

2. A burglar-alarm having clock-work, a bell-hammer, and a lock for saidwork, and a dropping weight for withdrawing said lock, connected withthe lock by a chain or cord and formed of a piece concave on its underside and winged, substantially as and for the purpose set forth.

CHARLES E. LUBURG.

\Vitnesses:

J OHN A. \Vrnnnnsnnmr, A. 1?. GRANT.

